详细描述

Features that allow stacking of a number of DotFeatures.

They transparently provide all the operations of DotFeatures, i.e.

a way to obtain the dimensionality of the feature space, i.e. $\mbox{dim}({\cal X})$

dot product between feature vectors:

$r = {\bf x} \cdot {\bf x'}$

dot product between feature vector and a dense vector ${\bf z}$ :

$r = {\bf x} \cdot {\bf z}$

multiplication with a scalar $\alpha$ and addition on to a dense vector ${\bf z}$ :

${\bf z'} = \alpha {\bf x} + {\bf z}$

在文件CombinedDotFeatures.h第45行定义。

继承图，类CCombinedDotFeatures

[图例]

所有成员的列表。

组合类型
struct	combined_feature_iterator
公有成员
	CCombinedDotFeatures ()
	CCombinedDotFeatures (const CCombinedDotFeatures &orig)
virtual	~CCombinedDotFeatures ()
virtual int32_t	get_num_vectors ()
virtual int32_t	get_dim_feature_space ()
virtual float64_t	dot (int32_t vec_idx1, int32_t vec_idx2)
virtual float64_t	dense_dot (int32_t vec_idx1, const float64_t *vec2, int32_t vec2_len)
virtual void	dense_dot_range (float64_t output, int32_t start, int32_t stop, float64_t alphas, float64_t *vec, int32_t dim, float64_t b)
virtual void	dense_dot_range_subset (int32_t sub_index, int32_t num, float64_t output, float64_t alphas, float64_t vec, int32_t dim, float64_t b)
virtual void	add_to_dense_vec (float64_t alpha, int32_t vec_idx1, float64_t *vec2, int32_t vec2_len, bool abs_val=false)
virtual int32_t	get_nnz_features_for_vector (int32_t num)
virtual EFeatureType	get_feature_type ()
virtual EFeatureClass	get_feature_class ()
virtual int32_t	get_size ()
virtual void *	get_feature_iterator (int32_t vector_index)
virtual bool	get_next_feature (int32_t &index, float64_t &value, void *iterator)
virtual void	free_feature_iterator (void *iterator)
virtual CFeatures *	duplicate () const
void	list_feature_objs ()
CDotFeatures *	get_first_feature_obj ()
CDotFeatures *	get_first_feature_obj (CListElement< CDotFeatures * > *&current)
CDotFeatures *	get_next_feature_obj ()
CDotFeatures *	get_next_feature_obj (CListElement< CDotFeatures * > *&current)
CDotFeatures *	get_last_feature_obj ()
bool	insert_feature_obj (CDotFeatures *obj)
bool	append_feature_obj (CDotFeatures *obj)
bool	delete_feature_obj ()
int32_t	get_num_feature_obj ()
virtual void	get_subfeature_weights (float64_t *weights, int32_t num_weights)
virtual void	set_subfeature_weights (float64_t *weights, int32_t num_weights)
virtual const char *	get_name () const
保护成员
void	update_dim_feature_space_and_num_vec ()
保护属性
CList< CDotFeatures * > *	feature_list
int32_t	num_vectors
	total number of vectors
int32_t	num_dimensions
	total number of dimensions

构造及析构函数文档

CCombinedDotFeatures ( )

constructor

在文件CombinedDotFeatures.cpp第18行定义。

CCombinedDotFeatures ( const CCombinedDotFeatures & orig )

copy constructor

在文件CombinedDotFeatures.cpp第24行定义。

~CCombinedDotFeatures ( ) [virtual]

destructor

在文件CombinedDotFeatures.cpp第35行定义。

成员函数文档

void add_to_dense_vec	(	float64_t	alpha,
		int32_t	vec_idx1,
		float64_t *	vec2,
		int32_t	vec2_len,
		bool	abs_val = `false`
	)			`[virtual]`

add vector 1 multiplied with alpha to dense vector2

参数:

	alpha	scalar alpha
	vec_idx1	index of first vector
	vec2	pointer to real valued vector
	vec2_len	length of real valued vector
	abs_val	if true add the absolute value

实现了CDotFeatures。

在文件CombinedDotFeatures.cpp第185行定义。

bool append_feature_obj ( CDotFeatures * obj )

append feature object

参数:

obj

feature object to append

返回:: if appending was successful

在文件CombinedDotFeatures.h第328行定义。

bool delete_feature_obj ( )

delete feature object

返回:: if deleting was successful

在文件CombinedDotFeatures.h第341行定义。

float64_t dense_dot	(	int32_t	vec_idx1,
		const float64_t *	vec2,
		int32_t	vec2_len
	)			`[virtual]`

compute dot product between vector1 and a dense vector

参数:

	vec_idx1	index of first vector
	vec2	pointer to real valued vector
	vec2_len	length of real valued vector

实现了CDotFeatures。

在文件CombinedDotFeatures.cpp第101行定义。

void dense_dot_range	(	float64_t *	output,
		int32_t	start,
		int32_t	stop,
		float64_t *	alphas,
		float64_t *	vec,
		int32_t	dim,
		float64_t	b
	)			`[virtual]`

Compute the dot product for a range of vectors. This function makes use of dense_dot alphas[i] * sparse[i]^T * w + b

参数:

	output	result for the given vector range
	start	start vector range from this idx
	stop	stop vector range at this idx
	alphas	scalars to multiply with, may be NULL
	vec	dense vector to compute dot product with
	dim	length of the dense vector
	b	bias

重载CDotFeatures。

在文件CombinedDotFeatures.cpp第120行定义。

void dense_dot_range_subset	(	int32_t *	sub_index,
		int32_t	num,
		float64_t *	output,
		float64_t *	alphas,
		float64_t *	vec,
		int32_t	dim,
		float64_t	b
	)			`[virtual]`

Compute the dot product for a subset of vectors. This function makes use of dense_dot alphas[i] * sparse[i]^T * w + b

参数:

	sub_index	index for which to compute outputs
	num	length of index
	output	result for the given vector range
	alphas	scalars to multiply with, may be NULL
	vec	dense vector to compute dot product with
	dim	length of the dense vector
	b	bias

重载CDotFeatures。

在文件CombinedDotFeatures.cpp第153行定义。

float64_t dot	(	int32_t	vec_idx1,
		int32_t	vec_idx2
	)			`[virtual]`

compute dot product between vector1 and vector2, appointed by their indices

参数:

	vec_idx1	index of first vector
	vec_idx2	index of second vector

实现了CDotFeatures。

在文件CombinedDotFeatures.cpp第85行定义。

CFeatures * duplicate ( ) const [virtual]

duplicate feature object

返回:: feature object

实现了CFeatures。

在文件CombinedDotFeatures.cpp第30行定义。

virtual void free_feature_iterator ( void * iterator ) [virtual]

clean up iterator call this function with the iterator returned by get_first_feature

参数:

iterator

as returned by get_first_feature

实现了CDotFeatures。

在文件CombinedDotFeatures.h第232行定义。

virtual int32_t get_dim_feature_space ( ) [virtual]

obtain the dimensionality of the feature space

返回:: dimensionality

实现了CDotFeatures。

在文件CombinedDotFeatures.h第70行定义。

virtual EFeatureClass get_feature_class ( ) [virtual]

get feature class

返回:: feature class

实现了CFeatures。

在文件CombinedDotFeatures.h第147行定义。

virtual void* get_feature_iterator ( int32_t vector_index ) [virtual]

iterate over the non-zero features

call get_feature_iterator first, followed by get_next_feature and free_feature_iterator to cleanup

参数:

vector_index

the index of the vector over whose components to iterate over

返回:: feature iterator (to be passed to get_next_feature)

实现了CDotFeatures。

在文件CombinedDotFeatures.h第183行定义。

virtual EFeatureType get_feature_type ( ) [virtual]

get feature type

返回:: templated feature type

实现了CFeatures。

在文件CombinedDotFeatures.h第138行定义。

CDotFeatures* get_first_feature_obj ( )

get first feature object

返回:: first feature object

在文件CombinedDotFeatures.h第256行定义。

CDotFeatures* get_first_feature_obj ( CListElement< CDotFeatures * > *& current )

get first feature object

参数:

current

list of features

返回:: first feature object

在文件CombinedDotFeatures.h第268行定义。

CDotFeatures* get_last_feature_obj ( )

get last feature object

返回:: last feature object

在文件CombinedDotFeatures.h第302行定义。

virtual const char* get_name ( ) const [virtual]

返回:: object name

实现了CSGObject。

在文件CombinedDotFeatures.h第379行定义。

virtual bool get_next_feature	(	int32_t &	index,
		float64_t &	value,
		void *	iterator
	)			`[virtual]`

iterate over the non-zero features

call this function with the iterator returned by get_first_feature and call free_feature_iterator to cleanup

参数:

	index	is returned by reference (-1 when not available)
	value	is returned by reference
	iterator	as returned by get_first_feature

返回:: true if a new non-zero feature got returned

实现了CDotFeatures。

在文件CombinedDotFeatures.h第204行定义。

CDotFeatures* get_next_feature_obj ( CListElement< CDotFeatures * > *& current )

get next feature object

参数:

current

list of features

返回:: next feature object

在文件CombinedDotFeatures.h第291行定义。

CDotFeatures* get_next_feature_obj ( )

get next feature object

返回:: next feature object

在文件CombinedDotFeatures.h第279行定义。

int32_t get_nnz_features_for_vector ( int32_t num ) [virtual]

get number of non-zero features in vector

参数:

num

which vector

返回:: number of non-zero features in vector

实现了CDotFeatures。

在文件CombinedDotFeatures.cpp第201行定义。

int32_t get_num_feature_obj ( )

get number of feature objects

返回:: number of feature objects

在文件CombinedDotFeatures.h第358行定义。

virtual int32_t get_num_vectors ( ) [virtual]

get the number of vectors

返回:: number of vectors

实现了CFeatures。

在文件CombinedDotFeatures.h第61行定义。

virtual int32_t get_size ( ) [virtual]

get the size of a single element

返回:: size of a element

实现了CFeatures。

在文件CombinedDotFeatures.h第156行定义。

void get_subfeature_weights	(	float64_t **	weights,
		int32_t *	num_weights
	)			`[virtual]`

get subfeature weights

参数:

	weights	subfeature weights
	num_weights	where number of weights is stored

在文件CombinedDotFeatures.cpp第216行定义。

bool insert_feature_obj ( CDotFeatures * obj )

insert feature object

参数:

obj

feature object to insert

返回:: if inserting was successful

在文件CombinedDotFeatures.h第314行定义。

void list_feature_objs ( )

list feature objects

在文件CombinedDotFeatures.cpp第40行定义。

void set_subfeature_weights	(	float64_t *	weights,
		int32_t	num_weights
	)			`[virtual]`

set subfeature weights

参数:

	weights	new subfeature weights
	num_weights	number of subfeature weights

在文件CombinedDotFeatures.cpp第234行定义。

void update_dim_feature_space_and_num_vec ( ) [protected]

update total number of dimensions and vectors

在文件CombinedDotFeatures.cpp第58行定义。

成员数据文档

CList<CDotFeatures*>* feature_list [protected]

feature list

在文件CombinedDotFeatures.h第387行定义。

int32_t num_dimensions [protected]

total number of dimensions

在文件CombinedDotFeatures.h第392行定义。

int32_t num_vectors [protected]

total number of vectors

在文件CombinedDotFeatures.h第390行定义。

该类的文档由以下文件生成：

CCombinedDotFeatures类参考

详细描述

组合类型

公有成员

保护成员

保护属性

构造及析构函数文档

成员函数文档

成员数据文档